樣本分佈 的英文怎麼說

中文拼音 [yàngběnfēnbù]
樣本分佈 英文
sample distribution
  • 樣 : Ⅰ名詞1. （形狀） appearance; shape 2. （樣品） sample; model; pattern Ⅱ量詞（表示事物的種類） kind; type
  • 本 : i 名詞1 （草木的莖或根）stem or root of plants 2 （事物的根源）foundation; origin; basis 3 （本錢...
  • 分 : 分Ⅰ名詞1. （成分） component 2. （職責和權利的限度） what is within one's duty or rights Ⅱ同 「份」Ⅲ動詞[書面語] （料想） judge
  • 樣本 : sample book; specimen; advanced copy; sample; muster; scantling; instance; statistics
  1. In the present study, aflp ( amplified fragment length polymorphism ) markers was used to examine population of abies yuanbaoshanensis in order to understand the level of population genetic variation and genetic structure. the result would help to evaluate its evolutionary potentiality and the degree of being endangered and could provide scientific basis for making right protection strategy. high - quality dna was extracted using ctab method from those tender leaves of forty - three fully - developed trees in population abies yuanbaoshanensis

    本研究選用一種高效的檢測遺傳變異的分子標記? ? aflp技術來分析元寶山冷杉種群的遺傳多樣性，旨在了解該種群在分佈區內的遺傳變異水平和遺傳結構情況；研究結果將有助於更清楚地認識這一瀕危類群的生存潛力和瀕危程度，而且可以為制定何種挽救和保護措施提供科學的依據。
  2. In this paper a kind of cardio - cerebral arterial bifurcation vessel hemodynamic characteristics are studied with the boundary element method, and the blood flowing velocity vector distributions have been calculated. in addition, the flow field distribution and the pressure on the particle surface are also calculated, when there is flow - round particle at the place of bifurcation, the move tendency of the particle is judged, the possible reasons of causing the atherosclerosis, thrombus, angioma are analysed

    本文用邊界元方法研究了一類典型心腦動脈分支血管中血液流動的流體動力特性，計算了分支血管血液流動的速度矢量分佈，同時計算了分支附近有多個顆粒狀繞流物時血液的流場分佈，及顆粒物所受壓力狀況，給出了顆粒物的運動趨勢，分析了引起粥樣斑塊病變、血瘤、血栓的可能原因
  3. The study would offer the science evidence to prevention and cure against grasshoppers and the protection of biodiversity, and also the basic information to continuant development of local biodiversity

    本研究豐富了漢中地區物種多樣性的內容，探討了漢中地區蝗總科昆蟲的物種多樣性和生態系統多樣性特點和分佈規律，為蝗蟲的防治和生物多樣性保護提供科學依據，為本地區生物多樣性的可持續發展提供基礎資料。
  4. Employment of copula in the analysis involving bipit of extreme value samples

    於二維樣本極值概率積分變換分佈分析中的應用
  5. If we wish to avoid the inaccuracies caused by the size of the sample, we need to use the t distribution.

    為了避免因樣本容量大小而造成的誤差，我們必須使用T分佈。
  6. At last, the conclusions of the whole thesis are drawn, and it is put forward that the future research emphases on the infrared radiation absorption ct technology should focus on : instantly get the absorption projections are the crucial factor to utilize the technology industrially ; on the basis of the hypothesis that the gas is ideal gas, species concentration of particular gas medium can be measured at the same time, which must be helpful to comprehend combustion essence ; if laser source to replaces blackbody stove, for irradiant flame, interferometric projection can be attained, and its temperature distribution will known

    最後，對全文進行了總結，並指出今後研究工作重點。指出：瞬時得到各方向的投影是此技術實用化關鍵；在獲得溫度分佈信息基礎上，進行必要的假設和推導，能同時得到火焰中某特定組分濃度的分佈，這必將進一步我們對燃燒本質的理解；利用方向性好，輻射強度高的激光源代替常規的黑體爐，能得到輻射干涉投影圖像，這樣就能測量所介紹系統不能測量的發光火焰溫度分佈。
  7. Firstly, by numerical and theoretical analysis, the author compares some existent confidence intervals, for example, " exact " confidence interval, wald confidence interval and bayesian confidence interval, and finds some deficiencies points of the confidence intervals, whose modification version has been proposed. also, several better confidence intervals such as are also presented. secondly, for given confidence coefficient and interval width, the author constructs a class of asymptotical two - stage interval estimate procedures. at the same time, under varies restriction of confidence coefflcientent interval width, the optional sample size of the first stage has been computed by numerical computation. the numerical computation shows that the method considered in this dissertation have good properties and applied value

    同時，由於poisson分佈的特性，我們知道不存在其參數區間長度小於0 . 5的置信區間，基於這些情況，我們主要展開了以下兩個方面的研究：一是利用數值計算分析與理論分析的方法對現有的若干置信區間如「精確」置信區間， wald置信區間， bayes置信區間等進行分析比較，發現了一些缺陷，針對這些缺陷，我們進行適當的修正，並得到幾種性質較好的置信區間如：修正大樣本區間jeffreys原則下置信區間二是針對已給定的置信系數與區間長度，我們提出了一種漸近的兩階段區間估計程序，並利用數值計算的方法，在各種置信系數與區間長度限定下，算出了最優的第一階段觀測次數（抽樣量） ，大量數據表明，本文考慮的方法性態良好，具有應用價值。
  8. The disquisition includes choice of algorithm, accomplish of algorithm, collection of learning sample, parameter of net, shortcoming of bp algorithm, extraction and reduction form line etc. referring to shortcoming of traditional bp algorithm, a modified learning factor with adaptation is introduced. because of every different font has robust, the way based chain coded and knaggy feature is used. a bizarre sample feature database is constructed for speeding up modified bp learning and classification

    本文對人工神經網路理論進行了研究，探討了網路形式及演算法的選擇、演算法的實現、學習樣本的收集、網路參數選擇、 bp演算法缺陷、表格線提取、還原、生成及字元識別、還原生成等問題，並針對bp演算法的缺陷提出了和實現了改進型bp演算法，使網路學習效率提高，對不同人的不同字型字體有較強的魯棒性，採用了基於鏈碼特徵和凹凸分佈特徵的方法來抽取字元特徵。
  9. Previous researchers have always determined the sp atial distribution patterns ( sdp ) of castanopsis kawakamii with a sample - dis tance method. however, the distribution patterns may be affected by the quadrat si ze and, in the course of analysis, the density differences among the cluster plots are not considered ; therefore, differences of cluster plot size and the dispersi on degree among individuals of cluster plots can not be known. authers of this pa per have determined the spatial distribution patterns of castanopsis kawakamii population in different habitats by means of non - quadrat distance method and a nalysed the pattern intensity and grain of the sdp. the pattern intensity is defi ned with the relative density differences and the pattern grain can embody the d ispersion degree of the individuals in the plots, and the dispersion degree among the plots. the determined results are as follows. the intensities of the species range in order from strong to week : litsea mollifolia p. kawakamii i. purpure a r. cochinchinensis c. kawakamii c. carlessii d. oldphamii s. superba. the gra ins of the species queue in order from coarse to close : s. superba = litsea mollif olia r. cohinchinensis c. kawakamii = i. purpurea c. carlessii p. racemosam d. oldp hamii. these determined results tally basiclly with the results authers of this paper have got in determining the same plots by means of aggregate index access ing method. in view of this, it is held that the sdp of c. kawakamii is closely related to the habitats and biological features

    前人都是採用樣方方法對格氏栲種群數量的空間格局進行測定，而格局分佈有可能受樣方大小的影響，且分析過程中沒有涉及聚塊間密度差的問題，因而無法掌握種群的聚塊大小差別及聚塊內個體間的離散程度.本研究採用無樣方距離法，測定不同生境的格氏栲種群空間格局，分析格氏栲種群格局的強度和紋理.強度以聚塊和間隙的密度差來定義，紋理則是體現聚塊內個體間的離散程度與諸聚塊間的分離程度.測定結果表明，格氏栲種群格局強度從高到低排列次序為：木姜子蚊母樹冬青茜草樹格氏栲米櫧虎皮楠木荷；格局紋理從粗到細的順序是：木荷=木姜子茜草樹格氏栲=冬青米櫧蚊母樹虎皮楠.這一測定結果與作者採用聚集度指標測定相同樣地格氏栲種群空間格局的結果基本相符.因此，格氏栲空間格局類型及分佈與格氏栲生物學特性及生境的關系密切
  10. Statistical analysis of accelerated life test on lognormal distribution case under type i censoring

    對數正態分佈定時截尾樣本下加速壽命試驗的統計分析
  11. Although its function is not known completely, pv may play important roles in the axonal flow, cell metabolism and synaptic transmission through binding with ca2 +. our previous studies showed that pv is distributed densely in the relay nuclei on the central four orders pathway of the trigeminal proprioceptive sensation and there are approximately 30 - 50 % of pv - li neurons projected to vpm of the thalamus in the third - order nuclei

    我們最近的研究表明， pv樣免疫陽性細胞在三叉神經本體覺中樞通路各級核團中均有較密集的分佈，並且在二、三級神經元所在地? vodm - lrf和帶狀區中大約有30 - 50的pv樣陽性神經元為投射神經元。
  12. This paper researches on the water and suspension in zhujiang ( pearl ) river and her three branches, sampling in makou hydrological gorge station of xijiang river, hekou hydrological gorge station of beijiang river and boluo hydrological gorge station of dongjiang river. the author calculated the riverine carbon flux and measured the content of different carbon forms and carbon isotope composition. furthermore, the author also studied drainage basin erosion and the influence of vegetation distribution on erosion

    本文以珠江水體、懸浮物為研究對象，通過對西江馬口、北江河口、東江博羅斷面水體取樣，分析水體中不同形態碳含量，測定碳同位素值，並計算了河流碳通量值；還對珠江流域的侵蝕狀況及植被分佈對流域侵蝕的影響進行了探討。
  13. This paper concerns studies on rhizobia in symbiosis with important legume soybean and peanut crops in china, following : 1 ) summarized bio - diversity of rhizobia, including indigeneous population, isolation frequency, strain type, distribution, and strain - host promiscuity and compatibility from large and small samples. 2 ) reviewed symbiont improvement in both sides of rhizobia and hosts, involving selection of effective rhizobial strains, evoluation and utilization of the host germplasm for symbiotic properties, and selection of the both sides for special characters. 3 ) discussed the subject on the rich symbiont germplasm resource in china and on further research being necessary to exploitation and utilization of the benificial germplasm

    針對我國主要豆科作物大豆和花生的研究成果，並結合本身研究工作內容， （ 1 ）總結了與宿主共生的根瘤菌生物學多樣性，包括大、小樣本的土著根瘤菌群體數量、分離頻率、類型與分佈及其菌株宿主共生混交性與親和性； （ 2 ）評述了根瘤菌宿主植物共生體雙邊固氮改良，包括優良菌株的選育、宿主品種資源共生特性的評價與利用及特異性狀的選擇； （ 3 ）討論了我國這一類共生體資源的豐富性以及有必要進一步加大力度研究有益資源的開發和利用的問題。
  14. Abstract : this paper concerns studies on rhizobia in symbiosis with important legume soybean and peanut crops in china, following : 1 ) summarized bio - diversity of rhizobia, including indigeneous population, isolation frequency, strain type, distribution, and strain - host promiscuity and compatibility from large and small samples. 2 ) reviewed symbiont improvement in both sides of rhizobia and hosts, involving selection of effective rhizobial strains, evoluation and utilization of the host germplasm for symbiotic properties, and selection of the both sides for special characters. 3 ) discussed the subject on the rich symbiont germplasm resource in china and on further research being necessary to exploitation and utilization of the benificial germplasm

    文摘:針對我國主要豆科作物大豆和花生的研究成果，並結合本身研究工作內容， （ 1 ）總結了與宿主共生的根瘤菌生物學多樣性，包括大、小樣本的土著根瘤菌群體數量、分離頻率、類型與分佈及其菌株宿主共生混交性與親和性； （ 2 ）評述了根瘤菌宿主植物共生體雙邊固氮改良，包括優良菌株的選育、宿主品種資源共生特性的評價與利用及特異性狀的選擇； （ 3 ）討論了我國這一類共生體資源的豐富性以及有必要進一步加大力度研究有益資源的開發和利用的問題。
  15. Injected group, 0. 1 % saccharin ( 1. 5 ~ 2ml / rat, in 5min ) intraoral infused group and cta group. the expression of endogenous leucin - enkephalin ( lek ) in the rat brain was observed and 5 parts of the thalamus including laterodorsal thalamic nucleus ( ld ), lateral part of mediodorsal thalamic nucleus ( mdl ), ventroposterolateral thalamic nucleus ( vpl ), ventroposteromedial thalamic nucleus ( vpm ) and reticular thalamic nucleus ( rt ) were comparatively researched before and after the acquisition of cta applying lek - immunocytochemistry. in behavioral experiment, 18 adult male sd rats were divided into normal cta group ( control ) and 2 naloxone i. p

    為探討cta形成過程中enk的作用，本實驗用成年雄性sd大鼠35隻，分為空白對照組、生理鹽水（ 2體重）腹腔注射組、 0 . 15mlicl溶液（ 2體重）腹腔注射組、 0 . 1糖精溶液口腔灌流組（ 1 . 5 - 2ml只， 5min ）和cta建立組，採用免疫細胞化學方法，觀察了亮腦啡肽（ lek ）陽性神經元在大鼠腦內的分佈情況，並比較了各組大鼠丘腦外側背核（ ld ） 、丘腦內側背核外側部（ mdl ） 、丘腦腹后外側核（ vpl ） 、丘腦腹后內側核（ vpm ）以及丘腦網狀核（ rt ）等5個腦區內lek表達水平的差異；另外將成年雄性sd大鼠18隻，分為正常cta建立組以及在cta建立前或cta建立后阿片受體拮抗劑納洛酮（ 2mg kg體重）腹腔注射組，對內源性阿片樣物質對于cta建立和保持的影響進行了行為學研究。
  16. The thesis analyzes the sample distribution through quantificational and statistical way and hypothesis tests. the thesis discusses the mechanism that leads to the earning management of listed companies and the way through which the earning management come true. the thesis also proposes some suggestion about building up the securities business in our country

    本文採用實證研究的方法，選擇中國a股上市公司1998 ? 2000年度的凈資產收益率（ roe ）作為研究對象，對樣本分佈進行了定量的統計分析和假設檢驗，從理論和實踐相結合的角度系統地論述了上市公司盈餘管理形成的機制和實現方式，並對如何進一步健全我國證券市場提出了若干建議。
  17. To maintain high generalization ability, the most widespread class should be separated at the upper nodes of a binary tree

    為了獲得較高的推廣能力，必須讓樣本分佈廣的類處於二叉樹的上層節點，才能獲得更大的劃分空間。
  18. The results of simulation show that the soft sensor based on the proposed method has high precision and is suitable for time - varying system with samples which distribution is not uniform. 5

    工業數據模擬結果表浙江大學博士學位論文明，該方法在線建立的軟測量模型精度高，很適合慢時變對象、且訓練樣本分佈不均勻情況下的軟測量建模。
  19. Due to large - scale and imbalanced churn data, an improved svm - imbalance core vector machine svm ( icsvm ) was presented to predict customer churn, which has better arithmetic performance than others based on the test of real telecom data set

    基於實際客戶流失數據樣本數據量大、正負樣本分佈不平衡的特點，提出了一種改進支持向量機演算法，並將其用於電信行業的客戶流失預測。
  20. Nerve network have the ability to automatic orgnanization and automatic studying, and can adapt to find the rule, which is concealed in the sample data. the studying ability of the nerve network is different form the traditional pattern recognition, the latter depend on the knowledge about the ruler of the recognition, while it is not necessary to know the knowledge about the ruler of recognition for the nerve network, which can get the relation of samples from the data. the main job of this paper is about how to apply nerve network to the real time recognition

    神經網路具有自組織和自學習能力，能夠在學習過程中，自適應地發現蘊涵在樣本數據中的內在的特性及規律性，這一自學習的能力與傳統模式識別中所採用的方法不相同，後者往往依賴于編程者對識別規則的先驗知識，而神經網路對所要處理的對象在樣本空間的分佈狀態無需作任何假設，而是直接從數據中學習樣本之間的關系，因而它們還可以解決那些因為不知道樣本分佈而無法解決的識別問題。
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